Inflammation of the iris is called iritis (the iris is the part of the eye that determines its color), and sometimes the ciliary body behind the iris can become inflamed as well. When the iris becomes inflamed, tiny white cells in the inflamed area and too much protein from the small blood vessels in the eye float in the atrial fluid between the iris and cornea. If there are too many cells floating in the atrial water, they attack the back of the cornea and also settle in the atrial water. The cause of iritis is unknown. One eye or both eyes may be affected. Ophthalmologic examinations and set light examinations may be done, and it is more important to pay attention to changes in the signs and symptoms of iris inflammation. For the prevention of iritis, it is important to eat a light diet with less fatty, high sugar, fried foods, no potatoes, no alcohol or stimulating drinks such as coffee, and less hairy and spicy foods such as chili peppers, as Chinese medicine says. Eat more vegetables, fruits, fibrous foods, and drink more water. Pay attention to keep warm during treatment to avoid catching a cold. Because individual health conditions vary, some will recur, so regular check-ups at the hospital are necessary.